Do any of you have small medical bills that haven't been paid?  I believe this number is one of several used by Argent Healthcare (Health Care?).  They are a collection agency specializing in medical providers.  They have their own phone number which shows up on caller I.D., but when I don't pick up for them, I get a call from one of the 330-479-000whatever numbers.  It's happened too often to be coincidental.  Check out Argent's website.  (I forgot the addy, but I got it from google.)  They boast that they will go after small debts, too, not just the big ones and praise their staff for their relentless campaigns to get the money.  If you do not have any medical bills, I suggest you check your credit report.  I had someone using my SS number in a Tampa, FL, hospital recently and have had my mothers medical bills show up on my credit report.  I'm pretty sure this has got to be Argent.